Hierarchical thermal models of FOG-based strapdown inertial navigation system

Abstract

Hierarchical thermal models of strapdown inertial navigation system with fiber-optic gyros and accelerometers are constructed and studied. Thermal drift models of gyros and accelerometers are constructed and identified using experimental output data, and methods to minimize and algorithmically compensate the thermal drift are developed. Temperature calibration of sensors is performed using the thermal sensors’ data based on the constructed mathematical thermal compensation models, and the gyro drift is minimized.